package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) throws IOException {
        //原始文件名
        String originalFilename = file.getOriginalFilename();//abc.jpg
        //原始文件名后缀  .jpg
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;//dfsdfdfd.jpg
        File dir=new File(basePath);

        if(!dir.exists()){
            dir.mkdirs();
        }

        file.transferTo(new File(basePath+fileName));
        return R.success(fileName);

    }
@GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
    FileInputStream is=new FileInputStream(basePath+name);

    ServletOutputStream os=response.getOutputStream();

       IOUtils.copy(is,os);
    is.close();
}
}
